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Updated: Sep 11, 2025

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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Compact inverted digital holographic microscope based on common-path configuration.

Isma Javed, Muhammad Bilal Hassan, Ramna Khalid

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    Summary
    This summary is machine-generated.

    We developed a novel, compact 3D-printed holographic microscope for label-free imaging in life sciences. This robust and easy-to-align prototype simplifies microscopy for in-field applications.

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    Area of Science:

    • Life Sciences
    • Microscopy
    • Optical Engineering

    Background:

    • Holographic imaging offers 3D visualization of microscopic structures.
    • Current microscopy techniques (confocal, multiphoton, digital holography) have limitations including bulky components, cost, and complex alignment.
    • There is a need for simpler, more robust, and field-deployable microscopy solutions.

    Purpose of the Study:

    • To propose and prototype a compact, label-free, and easy-to-align inverted holographic microscope.
    • To overcome the limitations of existing microscopy technologies.
    • To enable in-field measurements and real-time monitoring of live and transparent samples.

    Main Methods:

    • Development of a 3D-printed inverted holographic microscopy prototype.
    • Utilized a common-path holographic configuration compatible with high numerical aperture objectives.
    • Incorporated automated control and sophisticated stages for self-focusing along three axes.
    • Leveraged light field technology for optical setup simplification.

    Main Results:

    • The prototype is compact, label-free, and easy to align.
    • Demonstrated simplicity, robustness, and high temporal stability.
    • Achieved automated self-focusing capabilities.
    • Enabled real-time monitoring of live organisms and transparent samples without an antivibration table.

    Conclusions:

    • The developed holographic microscope prototype addresses the limitations of current technologies.
    • The device offers a robust, standalone, and simplified solution for advanced 3D imaging.
    • Opens new possibilities for in-field life sciences applications and measurements.